CN205859255U - A kind of water hammer-resistant reflux inlet structure - Google Patents

Abstract

The utility model relates to a structure of an anti-hammer return valve. The purpose of the utility model is to propose a structure of an anti-hammer return valve, which improves the water hammer protection effect of the water delivery system and saves engineering investment. The technical scheme of the utility model is: a waterproof hammer backflow valve structure, which has a long-distance water delivery pipeline, and a water pump and a common butterfly valve arranged on the water delivery pipeline in sequence along the water flow direction, and is characterized in that: the water pump and the common butterfly valve An anti-hammer return valve with automatic opening and closing function is set on the water delivery pipeline between them; a number of flow holes are opened on the disc of the anti-hammer return valve. The utility model is suitable for long-distance pump station water delivery projects.

Description

A structure of anti-hammer return valve

technical field

The utility model relates to a structure of a water-proof hammer return valve, which is suitable for a long-distance pumping station water delivery project.

Background technique

The check valve refers to the valve that relies on the flow of the water body itself to automatically open and close the disc to prevent the backflow of the water body. The check valve is a kind of automatic valve. Under the action of fluid pressure flowing in one direction, the valve disc opens; when the fluid flows in the opposite direction, the valve disc is closed to the valve seat by the fluid pressure and the self-weight of the valve disc to cut off the flow. Its main function is to prevent backflow of water body, reverse rotation of pump and driving motor, and discharge of water body. It is often used behind the pump in long-distance water supply systems to prevent the backflow of excessive water from causing impact on the pump. However, since the check valve is automatically closed when the water backflows, the speed is very fast, which will cause a large water hammer pressure value, so When installing check valves in engineering, expensive overpressure relief valves, pressure fluctuation pre-stop valves or air tanks are usually installed behind the pumps to jointly protect against water hammer, which limits the use of check valves to a certain extent.

Contents of the invention

The technical problem to be solved by the utility model is: aiming at the above existing problems, a structure of an anti-hammer return valve is proposed to improve the water hammer protection effect of the water delivery system and save engineering investment.

The technical scheme adopted in the utility model is: a structure of a water-proof hammer return valve, which has a long-distance water delivery pipeline, and a water pump and an ordinary butterfly valve are arranged on the water delivery pipeline in sequence along the water flow direction, and is characterized in that: the water pump and the An anti-hammer return valve with automatic opening and closing function is installed on the water delivery pipeline between ordinary butterfly valves; the disc of the anti-hammer return valve is provided with a number of flow holes.

The beneficial effects of the utility model are: the utility model is convenient for construction, can not only reduce the pressure rise behind the water hammer return valve, but also reduce the reverse speed of the water pump, improve the water hammer protection effect of the water delivery system, ensure the safety of the pump station operation and Improve economic efficiency.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a structural schematic diagram of the valve clack in the present invention.

detailed description

As shown in Fig. 1 and Fig. 2, this embodiment is a structure of an anti-hammer return valve, which has a water delivery pipeline 4 used in a long-distance water supply system. Valve 1 and common butterfly valve 3. The valve clack 5 of the anti-hammer backflow valve 1 has the function of automatic opening and closing, and a plurality of flow holes 6 are opened on the valve clack 5 . The disc 5 automatically opens when the water flows downstream, and closes automatically when the water flows backwards. The flow hole 6 provided on the disc 5 allows a small amount of water to flow back through the disc 5 when the water flows backwards, so as to control the pressure rise. And the purpose of pump speed increase.

The basic working principle of this embodiment: the disc 5 of the anti-hammer return valve 1 is preset with several small flow holes 6 during production. Falling, the water pipeline 4 is blocked by the valve disc 5, but the water body does not completely resist outside the anti-hammer return valve 1, but allows part of the water flow to pass through several flow holes 6 (playing the role of partial decompression), so It can avoid the excessive pressure rise of the anti-hammer return valve 1. Although there is a small amount of water flow, it will not cause the high-speed reversal of the water pump 2, and also protect the safety of the water pump 2. It can not only reduce the pressure rise but also reduce the reversal of the water pump 2. The dual purpose of rate.

Since there are differences in each project, the number and size setting of the flow holes 6 need to be specially customized according to the characteristics of each project.

Claims (1)

1. An anti-hammer backflow valve structure has a long-distance water delivery pipeline (4), a water pump (2) and a common butterfly valve (3) arranged successively on the water delivery pipeline along the water flow direction, characterized in that: the water pump (2) and the water delivery pipeline (4) between the ordinary butterfly valve (3) is provided with an anti-hammer return valve (1) with automatic opening and closing function; the disc (5) of the anti-hammer return valve (1) A number of flow holes (6) are opened on the top.